Explain five ways that eukaryotic gene regulation is more complex than bacterial gene regulation?
What will be an ideal response?
(1 ) Eukaryotes have histones, whereas bacteria don't have histones and these histones have to be removed to turn on gene expression. (2 ) Eukaryotes have a nucleus and therefore transcription occurs in the nucleus and translation occurs in the cytoplasm, whereas bacterial transcription and translation are coupled in the cytoplasm. (3 ) mRNAs in eukaryotes are processed (splice, poly-adenylated, and addition of modified guanine) before they are translated, whereas bacterial mRNA are not processed in a similar way. (4 ) mRNA in eukaryotes is typically much longer lived, whereas bacterial mRNAs are degraded shortly after they are transcribed. (5 ) Eukaryotes have a larger array of post-translational mechanisms than bacteria.
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What are the three phases of translation?
What will be an ideal response?
On a hot, dry day a plant closes its stomata thereby conserving water. Which plant hormone is responsible for the
closing of the stomata?
a. auxin b. gibberellin c. ethylene d. cytokinin e. abscisic acid
Primary protein structure is formed by
a. hydrophobic interactions. b. hydrogen bonds. c. bonds between amino acids. d. covalent linkages between carbon and oxygen. e. all of these.
Which portion of the lymphatic system is the major site of antibody production?
a. spleen b. all lymph nodes c. liver d. thymus gland e. thoracic duct